21333011122009 has 6 divisors (see below), whose sum is σ = 22661710776974. Its totient is φ = 20078128114560.

The previous prime is 21333011121997. The next prime is 21333011122013. The reversal of 21333011122009 is 90022111033312.

It can be written as a sum of positive squares in 3 ways, for example, as 14052339336025 + 7280671785984 = 3748645^2 + 2698272^2 .

It is not a de Polignac number, because 21333011122009 - 2⁵ = 21333011121977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21333011122019) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 36908323452 + ... + 36908324029.

Almost surely, 2^{21333011122009} is an apocalyptic number.

It is an amenable number.

21333011122009 is a deficient number, since it is larger than the sum of its proper divisors (1328699654965).

21333011122009 is an equidigital number, since it uses as much as digits as its factorization.

21333011122009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73816647515 (or 73816647498 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 28.

The spelling of 21333011122009 in words is "twenty-one trillion, three hundred thirty-three billion, eleven million, one hundred twenty-two thousand, nine".